Sivasubramanian - Perl Developer - Bangalore, Karnataka, India

Krishnakumar Sivasubramanian

Bangalore, Karnataka, India


Perl Developer

Work History

Senior Technical Lead

Sonus Networks

March 2005 - March 2005

Development & sustenance of Custom-Adaptors & Generic-Adaptors for the Mediation Product "Data Stream Integrator".
Clients : AT&T(US), Willcom(Japan), Marcatel (Mexico), KDDI (Japan),
Jupiter-Communication (Japan), Alestra (Mexico), Golden lines (Israel), Verizon(US), Telecom Malaysia, SoftbankBB(Japan), Fintel ( Fiji ), Convergia ( International)
Telecom-Mediation Product: DSI of Sonus,
VOIP Gateways/Softswitch: GSX of Sonus, ASX of Sonus, BS of Broadsoft, SBX of Sonus
Hardware & OS : Sun (Solaris9/10) , Red Hat Linux
Team-size : 1 to 4
Duration : 3 days to 2 months per customer-adaptor

Role& Responsibility :
• Support project-manager in estimation of work, time and schedule.
• Support requirement-engineer in feasibility of features in mediation system.
• Coding of adaptor following quality standards.
• Coding & testing of parsers using perl & unix shell script. Parsers display the adaptor-output in easily viewable format.
• Review of test-plan, test-cases, test-results.
• Support testing-team of adaptor following quality standards.
• Support technical queries raised by onsite customer-support & production engineers.
• Measure traffic capacity of the adaptor under customer’s setup by load testing.
• Support technical-writer in documentation of release notes.

Mediation Team Member (Operation)

Reliance Infocomm

December 2003 - October 2004

Organization : BSS-Operation, Reliance Infocomm,
Client : Reliance Infocomm, Navi-Mumbai
Software : Inter-mediatE application by Intec Telecom Systems
Hardware & OS : 6 Sun system (SF6800) each with 12 CPU, 24GM RAM (Solaris8)
Team-size : 20
Duration : 11 months
Designation : Team Member
Role& Responsibility :
• Monitoring of polling status from source-stream & pushing status from down stream of all portals & equipments in Wireline, Wireless, data clusters and escalating polling/pushing problems to respective team through email, phone with follow-up or running utilities to solve the polling/pushing problems.
• POI Report(CDR’s as per requested specification in ascii format) generation.
• Reference table data verification before and after uploading.
• Test case CDR’s extraction and verification according to specification from field person.
• Partial & Integrated Audit Report Generation & verification of total figures in each stream & inform the concerned persons.
• Analyze & find the reasons for the CDR’s going into error-bucket & escalate the issue to concerned persons in development team & follow-up
• Manual processing of PRA(Partial Report Assembly) when there is a need.
• Using the physical log-book as management instrument for giving & taking feedback in Mediation team.
• Writing scripts in Awk, Unix Shell & C for assisting in mediation operational tasks
• Training & monitoring new members with the operational tasks.

Software Engineer

Vodafone Information System

January 2003 - January 2003

Organization :Vodafone Information System, Germany
Client :Vodafone D2,Germany
Software :Tcl
Hardware :PentiumIII
OS :Windows2000
Team-size :1
Duration :1 month
Designation :-Software Engineer
Role& Responsibility :Fixing Bugs.
Project Description :WAP-RADIUS simulator is used as input to the mediation product HP-IUM.

Project Associate

UshaMartin Academy of Communication Technology

August 2002 - December 2002

• Train students of finishing-school in operation of telephone-exchange simulator.

Senior Software Engineer


September 2000 - July 2001

• Testing of Telecom Billing system

Member, Technical Staff

Ericsson Hewlett-Packard Telecommunication Pvt. Ltd.

October 1998 - March 1999

Client : BTL(Bharthi Telenet Limited),Bhopal
Software :ASN.1 compiler, Oracle, Tcl
Hardware :HP-UX
OS :Unix
Team-size :4
Duration :6 months
Designation : :Member Technical Staff
Role& Responsibility : Installing Unix OS, Oracle & BMP software. Developing Tcl Scripts for CDR processing, ASN.1 (Abstract Syntax Notation) formats of CDR’s, Creation of jobs in BMP.
Project Description : BTL (Bharthi Telenet Ltd),Bhopal is the first private basic-telecom operator in India. BTL uses the product Billing Mediation Platform to collect data from the electronic telephone exchange, process them and distribute the data to the billing system. Processing involves format-conversion of CDR, selection and validation of field, routing of selected CDR

Senior Software Engineer

Tata Consultancy Services

July 1997 - October 1998

Project Title :Y2K compliance for Bell Industries
Organization :Tata-Infotech Limited, Noida
Client :Bell Industries USA
Software :MAPPER level 38R2B
Hardware :Pentium1
OS :Unisys /Clearpath
Team-size :8
Duration :5 months
Designation :Senior-Software Engineer
Role& Responsibility : Configuration & running of impact-analysis & renovation tools.
Raising queries to the client.
Review of impact-analysis report and renovation reports done by team-members.

Project Description : Year 2000 Renovation for MAPPER applications of Bell Industries, USA. Unisys in partnership with Tata-Infotech Limited has been awarded a contract by Bell Industries to conduct a Year 2000 renovation of its business applications. It consists of MAPPER applications running on the Unisys/Clearpath system supported by the 2.0 operating system and running MAPPER level 38R2B software. The scope of the project is around 660K lines of code(LOC).

Project Title :Y2K Compliance for NBS(Natal Business Society)
Organization : Tata-Infotech-Limited , Noida
Client : NBS,Durban,SouthAfrica
Software :MAPPER
Hardware :Pentium1
OS :Unisys mainframe, Clearpath
Team-size :9
Duration :5 months
Designation :Software-Engineer
Role & Responsibility :
• Configuration & running of the tools for Y2K impact assessment and renovation.
• Performing manual assessment for all date and Y2K impacted commands in the programs.
• Updating of impact assessment report at program level, raising queries.
• Preparation of Y2K compliant solutions for the impacted commands.
• Testing of renovated programs at unit & module level.
• Preparing unit level module level test plans.
• Documentation of test plans & test results.
• Handling of the configuration management for the project using an in-house developed tool.


Citicorp Overseas Software Limited (COSL)

July 1997 - December 1997

- Evaluation of e-form packages.
- Y2K compliance of library software.

Qualifications & Certifications


Birla Institute of Technology and Science


Birla Institute of Technology and Science

Kendriya Vidyalaya

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